| Augmented Sixth Chords | A category of chords that contain the interval of an augmented sixth that is formed by chromatic approaches to an octave.
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| French Augmented Sixth Chord | Adds a second scale degree.
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| German Augmented Sixth Chord | Adds 3 from the minor mode (in major either flat-3 or (2).
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| Italian Augmented Sixth Chord | When a third pitch class is included, usually the tonic pitch, which lies a M3 above the bass note.
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